I to am a walleye fisherman from Iowa, try around the kc area, there are walleyes in there, I have caught several trolling cranks.
Long line trolling is the best to get the bait down deep. And dont be afraid to troll 4 to 5 mph for walleye, make that crank bait hit the bottom, use your depth finder to find points, rocky point and humps in the lake. There are some good spots out there.
Randy